| 摘要 |
The invention relates to a seat cleaning-capable double-seat valve (1) with two serially arranged closing elements (3, 4), moveable relative to each other and designed as slide pistons, which prevent in the closed position of the double-seat valve (1) the overflow of fluids from one valve housing part (1a; 1b) into another (1b; 1a) through a connecting opening (2c) connecting the valve housing parts (1a, 1b) with each other and which border both in the closed and open position of the double seat valve (1) a leakage cavity (9), which is connected with the surroundings of the double-seat valve (1) via a tubular shaft (4b/4c) arranged on a low-lying (with respect to a vertical normal position of the double-seat valve (1)), second closing element (4), in which a drainage hole (4d) is arranged. An axially relocatable, cylindrical annular slide part (5) is provided.
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